How to express nth power in c++

Two ways to represent nth power in C: use the standard library function pow(), which receives base and exponent parameters. Customize the ^ operator via operator overloading to calculate the result using a loop.

How to express nth power in C

In C, there are two main ways to express n Power:

1. Standard library function pow()

pow() The function receives two parameters: The base and exponent, and returns the base raised to the power of the exponent. For example:

<code class="cpp">#include <cmath>

int main() {
  double base = 2;
  int exponent = 3;
  double result = pow(base, exponent);  // result 为 8
  return 0;
}</code>

2. Operator overloading

With operator overloading, you can define a custom operator to represent nth power. For example:

<code class="cpp">#include <iostream>

class Power {
public:
  double operator()(double base, int exponent) {
    double result = 1;
    for (int i = 0; i < exponent; i++) {
      result *= base;
    }
    return result;
  }
};

int main() {
  Power power;
  double base = 2;
  int exponent = 3;
  double result = power(base, exponent);  // result 为 8
  std::cout << result << std::endl;
  return 0;
}</code>

When using operator overloading, you can use the ^ operator to represent the nth power, for example:

<code class="cpp">int main() {
  double base = 2;
  int exponent = 3;
  double result = base ^ exponent;  // result 为 8
  return 0;
}</code>

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